Pulley.



NLA. KENDALL.

PULLEY.

APPLICATION FILED NOV.28, i917- 1,292,799. l Patented Jan.28,1919

5 F' j. A w 10 5 narran stares Parana carica.

MYRON A. KENDALI.,-or AURORA, ILLINOIS, A'ssIGNOR To STEPHENS-ADAMSON MANUFACTURING COMPANY, or AURORA, ILLINOIS, .A- CORPORATION or` ILLINOIS.

Specicati-on of Letters Patent.

` rULLnY.

ratenfeafJan. 28, 1919.

Application filed November 28, 1917. Serial No. 204,403.

To all whom it may concern: r

Be it known'that I, MYRON A. lxAENDALL,

a citizen of the United States, and residentof Aurora, county of Kane., and State of forming a part. thereof.

Illinois, have invented certain new and usefullmprovements in Pulleys, of which the following is al specification, and which are illustrated in theaccompanying drawings The invention relates inasmuch as belt conveyer installations frequently-require the l use of a very large number ofpulleysand to be desired.V

these are subjected to long service under ex: acting conditions While a free running of the pulleys at all tunes is of the utmost 1mportance in preventing undue wear upon the' Adust and dirt` usually present during the use of'conveyer belts and from the, escape Aof lubricant.

In the accompanying draWings,-.

' Figure 1 is a perspectivewieu7 of a pulley embodying the features of improvement provided by the invention, partly broken .away to show the constructionof the'bearings Fig. 2is a vertical ,axial section through one of the bearings,

Fig. 3 is a.l perspectiveview of one of .the pairs of ball races, and

Figs. 4, 5

ing means. l y The pulleys, as 10, provided by the invention are more particularly intended for use in individual U-shaped holders, as 11. 'In this ease yeach pulley and its holder constivtute an independentunit 'adapted to enter into the construction of abelt conveyer supf .port of any form, the" selected form `of the :so

support being produced by mounting the necessary number ofthe units upon a suit? fableframe. The rim12 of thepfulley is desirably made l vwithout joints, by cutting a.' wrought to pulleys and more. particularly tothose intended for use as supl ports for belt conveyors.

and 6 are perspectiveviews, each" showing a separatepart of the dirt excludmetal tube into lengths which are slightly longer Athan thei'inished pulley. The pulley 1,0 also comprises end plates 18 and 1l.'

These pulley ends are conveniently stamped from flat metal plates and each end may be formed with a plain circular periphery.

To provide a permanent and rigid connection of fthe' end plates 13, 1l with the rim 12, the ends of the tube from which' the rim is formed are rabbet-ed upon the inside, forrningan outwardly facing shoulder 15 anda "projecting flange 16.. After the end plates 13 and 14 have been placed in position, one against each of the shoulders 15, the flanges 16 are yfolded inwardly over the `edge of the corresponding plate. The end Aplates are thereby irmlyheldin place and the rim 12- of the pulley is provided with a smooth roundededge at each end.

The pulley `is preferably arranged to rotate about a stationary axle 17 and the ends .of this axle are carried by the upstanding ends of the l l-shaped holder 11.' As shown, the-axle' 17 1s of rectangular cross section.

For connecting the ends of the axle With the holder, the axle is grooved on its Opposite vertical faces, as at 18, into Which grooves extend the edges ofacross-shaped slot 19 in the holder 11. Under these circumstances, a wire; clip 2O may be employed for preventing displacement of the aXle 1-7 from the holder, particularly during transportation.

This wire clip .is formed to inclose and slide upon the pa1t21 of the holder. 1-1 above the horizontal portion of the cross shaped slot 19, the lower portion 22 of the' clip 'entering ythe said horizontal portion of the slot abovethe axle.

As belt conveyers are very largely employed-for conveying crushed ,rock and other hard material it i'swv'ery importan'tthat the fine dust ,and grit of such materia-l be `eX- cluded as far as possible from the bearing lsurfaces or otherwisev the bearings would require frequent lubrication and renewal. Pro Vteetion of the bearings from dust is accomplished in some measure by locating each.

bearing whollyfwithin the pl-ane of the corresponding end pla'te,` 13, 14. For this pur- 'pose the end plates 13'and 14 are depressed centrally to form relatively deep sockets 23,

to `the, inner ends of which sockets are at-4 tached cups 24, each cup forming the outer ball race of a ball bearing unit' generally -26 is mounted 0n a collar 27 surrounding the axle 17 and is supported laterally by means of washers 28 and 29. 4These washers pref` erably have rectangular apertures adapted to engage the rectangular axle 17 whereby the i washers are held against rotation and in turn the 'felt ring 26' is held against rotation by frictional engagement with the washers.

Preferably the outer Washer 29 is dished,

its outer edge being within the plane of the corresponding end plate 13, 14, while its central portion extends somewhat beyond the plane 'of the said end plate and contacts with the adjacent vpart of the yholder -11. With this construction, the parts are Iheld in position while at the same time any grit or-'dirt is shed by the inclined outer'surface of thewasher 29. Should a small amount f grit enter between the wall of the socket 23 and the outer edge of the washer 29 it would be caught by the felt ring 263 The dished form of the washer 29 also provides a convenient means for compressing the outer edge of the felt ring 26, thereby insuring contact of the periphery of the felt ring withthe side wall lof the socket 23.

I claim ,as my 'invention 1. The combination with a chambered belt conveyer pulley comprising an im'perforate i rim and a pair of centrally apertured but otherwise imperforate end plates,`each end I vplate being inwardly depressed` about its aperturejzo forni a relatively deep outwardly facing central socket, of a nonrotating axle y extending through the apertures of both end plates, an antifricticn bearing element seated in the socket of eachendplate and engaging the axle, each of' the said bearing elements being of lesslength than the corresponding socket, a non-rotating ring of soft dust-excluding and lubricant-retaining material seated in and substantially filling the socket of. each end plate in front of the-cerf responding bearing element and means for compressing said' ring, the compressing `means acting with greaterforce adjacent thev `periphery of the ring than at its inner edge.

`2. The-combination witha chamberedbelt `socket of each end end plates and the lbulging washer being located in front of the plane of the body portion of the lcorrespond-- aaea'iee y aperture to Aform a`relativcly deep outwardly facing central socket, of a non-rotating axleof rectangular cross-section extending through the apertures of both end plates, an antifriction bearing` element seated in the plate and engaging the axle, each of the said bearing elements being of less length than the correspondingy socket,

collar surrounding ,the shaft in front of' each bearing element` a ring of soft Idust excluding and lubricant' retaining material surrounding said collar and substantially filling the ofthe bearing element, and an outwardly bulging washer applied to the axle in front of leach collar and ring,7the rim' of each washer fitting within the socket of the corresponding end plate and the central portion'of each washer being located in front of the plane of the body portion of the corresponding pulley end plate whereby dirt is shed by the inclined outer surface of the socket of each endplate in front,`

Washer and the periphery of said ringlis j compressed into close contact with said socket by the inclined inner surface of thel washer. A 3. The combination with a chambered belt conveyer pulley comprising an imperforate rim and a' pair of centrally apertured but Y otherwise imperforate end plates, each end" plate being inwardly depressed about its aperture to form a relatively deep outwardly facing central socket, of Aa non-rotating axle extending through the apertures of both; end f plates, an antifr-iction bearing element seated in the socket of each end plate andengagin g the axle, each of the'said bearing elements being of less length than the correspending socket, a ring of soft dust-excluding and lubricant-retaining material seated in and substantially filling the socketof each end plate in front of the corresponding bearing. element and an washer applied to the :aXle in front of each of the said rings, the said bulging washers fitting .within the socket of the corresponding central portion of each ing pulley end plate, whereby dirt isl shed by the vinclined and the periphery of said ring is compressed into close contact with said socket by the inclined inner surface of the washer.

y MYRoN A. KENDALL.

outer surface ofthe washer outwardly bulging stiff n 

